MS21057L4K

View detailed technical data, stock status, and sourcing information for: MS21057L4K
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Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5310 Nuts and Washers

National Stock Number

5310-00-774-7167

Item Name Code

05280

Assigment Date

01/01/1960 (66 years ago)

prevailing torque all metal design locking feature, 0.098 inches minimum and 0.103 inches maximum mounting hole diameter, 3b thread class, right-hand thread direction, dry film lubricant lubrication

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Thread Class: 3b
Thread Direction: right-hand
Locking Feature: prevailing torque all metal design
Lubrication: dry film lubricant
Mounting Hole Diameter: 0.098 inches minimum and 0.103 inches maximum
Nut Style: plate
Nut Length: 0.955 inches maximum
Nut Height: 0.340 inches maximum
Plate Thickness: 0.055 inches maximum
Nut Mounting Provision: countersunk holes
Mounting Provision Location: opposite nut projection side
Mounting Hole Arrangement Style: 2 holes
Distance From Aperture Center To Mounting Hole Center: 0.495 inches minimum and 0.505 inches maximum
Temp Rating: 450.0 fahrenheit maximum
Thread Series: unjf
Thread Quantity Per Inch: 28
Hardness Rating: 49.0 rockwell c maximum
Nominal Thread Size: 0.250 inches
Countersink Angle: 99.0 degrees minimum and 101.0 degrees maximum nut
Mounting Hole Countersink Angle: 98.0 degrees minimum and 102.0 degrees maximum
Material: steel overall
Surface Treatment: cadmium overall
Surface Treatment Document And Classification: qq-p-416 fed spec single treatment response overall

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
15620-048BC	Plate Self-Locking Nut
K3100-4BC	Plate Self-Locking Nut
MS21057L4K	Plate Self-Locking Nut
T7SH428BC	Plate Self-Locking Nut

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5310-00-774-7167?

The FSCG of the NSN 5310-00-774-7167 is 5310

Does the NSN 5310-00-774-7167 have a Schedule B code assigned?

Yes, the Schedule B code is 7318160000

Does NSN 5310-00-774-7167 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5310-00-774-7167 contain precious materials?

Precious metal content is unknown

Does NSN 5310-00-774-7167 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5310-00-774-7167 was assigned to the Federal Catalog?

It was assigned 66 years ago, on Fri, Jan 1, 1960